Move CI scripts to the Makefile.

Signed-off-by: David Calavera <david.calavera@gmail.com>

.travis.yml

@@ -7,12 +7,6 @@
     email: false
   go:
     - 1.5
-  install:
-    - go get -t ./...
-    - go get github.com/golang/lint/golint
-  before_script:
-    - go vet ./...
-    - test -z "$(golint ./... | tee /dev/stderr)"
-    - test -z "$(gofmt -s -l . | tee /dev/stderr)"
-  script:
-    - go test -v ./...
+  install: make deps
+  before_script: test -z "$(make validate | tee /dev/stderr)"
+  script: make test

Makefile

@@ -1,10 +1,19 @@
-.PHONY: all osxkeychain test
+.PHONY: all deps osxkeychain test
 
 all: test
 
+deps:
+	go get -t ./...
+	go get github.com/golang/lint/golint
+
 osxkeychain:
 	mkdir -p bin
 	go build -o bin/docker-credential-osxkeychain osxkeychain/cmd/main_darwin.go
 
 test:
-	go test ./...
+	go test -v ./...
+
+validate:
+	go vet ./...
+	golint ./...
+	gofmt -s -l .